Curriculum Development Center for Science and Mathematics, Science Education Center University of the Philippines. (1977). High school science 1: Exploring our environment. Department of Education Culture and Sports.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Curriculum Development Center for Science and Mathematics, Science Education Center University of the Philippines. High School Science 1: Exploring Our Environment. Manila: Department of Education Culture and Sports, 1977.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Curriculum Development Center for Science and Mathematics, Science Education Center University of the Philippines. High School Science 1: Exploring Our Environment. Department of Education Culture and Sports, 1977.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.